Recently I was going through all of my drivers that I bought years ago and didn't do anything with, and I decided that I should start a new project. Since I'm working from home most days, and spending a huge amount of time in front of a PC, I decided that I'll use some of these smaller drivers to build new desktop monitors. I thought it would be fun to utilize my 3D printer for this project, so I whipped up a design in Fusion 360. This design is a very blatant ripoff of the Sonus Faber Cremona design. That's one of my favorite commercial speakers, and until I can make a full size set, I thought it would be great to have a mini set! The drivers that I intend to use will be the Dayton ND105-4 midwoofer and the ND20FB-4 tweeter.
Here is the design so far:
Right now the enclosures are very basic, and not printable on my printer due to a limited print volume. I intend to build the cabinet walls from laminations that will bolt & glue together. The rear panel may also be made that way. I still need to design the laminations and the interlocking features. I also intend to hollow the sides & back panel out so that I can fill them with sand to help damp them. The front panel I'm not real sure of yet. I'll probably need to print it in 2 pieces glue it together, so I'll need to fool with different ways to split it so that I get a good solid keyed glue joint.
Cosmetically, I intend to wrap the sides, top & bottom panels with a cherry vinyl that I have left over from a previous project. It looks pretty nice for being vinyl, and it'll allow me to wrap the radius around to the front baffle, which I wouldn't be able to easily do with real veneer. The front & rear panels will be a satin black. I may experiment with wrapping the front baffle in a faux leather similar to the real Sonus design if I get ambitious.
The enclosure is just a tad over .19cu-ft as it sits, with the expectation that port volume, crossover and drivers themselves will bring it down to around .17-.18cu-ft. That variation doesn't have much of any impact on the overall response. SPL is with 15w of input, which is right below the driver's xmax at around 80hz. The driver unloads below 50hz, but since I'll be sitting 2' from them, realistically I'll probably never get them close to xmax.
No idea what I'll do for a crossover yet. I may fool with modeling it in PCD, but I don't seem to have good luck getting realistic results using FRD/ZMA files even when I extract minimum phase, so I'll probably take in-box measurements and design the filter from that. Because of the smooth response of the drivers, I'm hoping to get away with something nice and simple, but we'll see.
Here is the design so far:
Right now the enclosures are very basic, and not printable on my printer due to a limited print volume. I intend to build the cabinet walls from laminations that will bolt & glue together. The rear panel may also be made that way. I still need to design the laminations and the interlocking features. I also intend to hollow the sides & back panel out so that I can fill them with sand to help damp them. The front panel I'm not real sure of yet. I'll probably need to print it in 2 pieces glue it together, so I'll need to fool with different ways to split it so that I get a good solid keyed glue joint.
Cosmetically, I intend to wrap the sides, top & bottom panels with a cherry vinyl that I have left over from a previous project. It looks pretty nice for being vinyl, and it'll allow me to wrap the radius around to the front baffle, which I wouldn't be able to easily do with real veneer. The front & rear panels will be a satin black. I may experiment with wrapping the front baffle in a faux leather similar to the real Sonus design if I get ambitious.
The enclosure is just a tad over .19cu-ft as it sits, with the expectation that port volume, crossover and drivers themselves will bring it down to around .17-.18cu-ft. That variation doesn't have much of any impact on the overall response. SPL is with 15w of input, which is right below the driver's xmax at around 80hz. The driver unloads below 50hz, but since I'll be sitting 2' from them, realistically I'll probably never get them close to xmax.
No idea what I'll do for a crossover yet. I may fool with modeling it in PCD, but I don't seem to have good luck getting realistic results using FRD/ZMA files even when I extract minimum phase, so I'll probably take in-box measurements and design the filter from that. Because of the smooth response of the drivers, I'm hoping to get away with something nice and simple, but we'll see.
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Hello,
I'm also embarking on the manufacture of sonus faber cremona M and I'm looking for the 2D plan to make the digital cuts.
So if you have a model, I'm interested ^^
Thanks and good luck for manufacture.
Prelude from France.
I'm also embarking on the manufacture of sonus faber cremona M and I'm looking for the 2D plan to make the digital cuts.
So if you have a model, I'm interested ^^
Thanks and good luck for manufacture.
Prelude from France.
Interesting project. I wouldn't mind a 3d printer, but the software side puts me off. Imagine spending all that money on a printer, and not being able to master the software.
3d printed enclosures could open up loudspeaker design, or building, to a lot of people who would normally shy away because they don't like, or can't do woodwork.
3d printed enclosures could open up loudspeaker design, or building, to a lot of people who would normally shy away because they don't like, or can't do woodwork.